[dessant]

Mozilla is free to implement Manifest v3, while preserving the webRequest API in its current state. Maintaining the blocking abilities of the webRequest API would not introduce any incompatibilities with Chrome extensions, because they simply would not use that part of the API.

[zamadatix]

I think the concern is they might also be "free" to find alternative sources of funding if that were the case not whether or not it's technically feasible to support an API that exists today.

[dessant]

Of course, I'm mainly pointing out that if Mozilla retorts to use compatibility as a reason for deprecating parts of the webRequest API, they'll most likely be dishonest.